carrick



T. J. OARRIGK. Head-Rest.

No. 2::2,276. Patented Jan. 6,1880.

Miami Witnesses: Inventor;

M 5. Jim,

NYPETERS, PHOTO-LITHDGRAPHER, WASHINGTON, Dv c.

UNITE STATES PATENT QFFICE.

THOMAS J. UARRIOK, OF BALTIMORE, MD., ASSIGNOR, BY MESNE ASSIGN- MENT,TO SAMUEL STOCKTON WHITE, OF PHILADELPHIA, PA.

HEAD-REST.

SPECIFICATION forming part of Letters Patent No. 223,276, dated January6, 1880.

Application filed May 9, 1879.

To all whom it may concern Be it known that l, THOMAS J. OARRICK, ofBaltimore, in the county of Baltimore and State of Maryland,haveinvented a new and useful improvement in Head-Rests,ot' which thefollowing is a specification.

My invention relates .to certain improvements in head-rests particularlyadapted for the use of dentists.

One part of the invention is applicable for either a portable head-restor for permanent attachment to a dental chair, while another part isdesigned exclusively as part of a headrest for attachment to an ordinarychair or seat I 5 back, thus providing a portable article suitable forcountry practitioners.

My invention will first be described in connection with theaccompanyingdrawings, and then designated in the claims.

Figure l is a side view, showing the headrest attached to a portablestandard. Fig. 2 is a rear View, in which the head-rest proper isremoved from its shank. Fig. 3 is a vertical section of the hook. Fig. 4is a perspective of the lower standard broken. Fig. 5 is a cross-sectionof standard. Fig. 6 is the clamp for the head-rest.

The letter A represents the hook to fit over the back of an ordinarychair. The body of 0 this hook is provided with a vertical eye, I), (seeFig. 3,) and upon one side is a set-screw, c, which enters the eye. Thestandard 13, the upper end of which supports the head-rest, passesthrough the vertical eye, from which it 3 5 will be seen the hook may beadjusted on the standard to suit the height of chair-back or thepatients head, and rigidly set by means of the set-screw c, orequivalent device, which comes in contact with the shallow notches a,formed 40 on the rear side of the standard, which prevent the set-screwfrom slipping on one side of the standard B, the entire straight portionof which is grooved, as seen at d.

An extension part, E, of standard is of suitable size and shape to fitthe groove on the part B, and its lower end is curved, as seen at E, toextend under the chair-seat, and is provided with a setscrew, f. Oneedge of the extension is provided with notches h. A set screw, t, theend of which screwsinto an ofi'set on the rear edge of standard B, isprovided, next to the threaded part, with a beveled enlargement, Ir,similar to the under side of the head of an ordinary wood-screw, andabove the enlargement has the thumb-piece by which the screw is turned.The location of this screw alongside ot' the groove in standard Bis suchas to permit the extension part E to slide freely when the beveledenlargement is withdrawn; but when the screw is turned so as to bringthe beveled enlargement into coincidence or engagement with one of thenotches h, then the extension part E is rigidly connected with the partB.

From this description it will be seen the standard and its extension,provided with setscrewf and the adjustable hook A, constitute the partsby which the head-rest is attached to a chair. l

The head-rest is attached to and is adjusta- 7o ble on the curved part Bat the upper end of the standard.

The letter F represents the head-rest proper, having secured at its backametal socket, 1, into which the adjusting rod or head-rest shank m issecured by a pin, a, or other suitable means. The head-rest shank may beof any length to give the desired range of adjustment, and is held bymeans of a suitable clamp, H, consisting of an eye or griper, throughwhich the rod or shank passes, and means to cause the eye to tighten onthe rod, so as to permit its adjustment in the clamp at any part of itslength. In the present instance the elamp has an eye, 9, slit or open onone side, (see Fig. 6,) with the part 12 on each side of the slitextended and terminating in a semicircular base, 1), the two basesforming a section of a cone, which, when compressed together, cause theeye to gripe or tighten on the go rod m. To eit'ect this a plate, q, isprovided at each end with a screw-threaded hole, and has in the center atapering hole in size and shape to correspond with the cone shape of thesemicircular bases of the clamping-eye over which 5 the plate fits, andby drawing down on which the extended parts of the eye are compressed,thus tightening the eye on the rod.

To provide clamping means by which to id just the clamp that holds thehead-rest up or I00 down on the standard, a second plate, 9*, also hasat each end a hole, and is of aform to fit over the broad side of thestandard B and encompass both edges thereof, by which means it mayreadily slide on the curved part of the standard. A screw, 8, connectsthe two plates at one end, and a thumb'set-screw, L, serves to securethe clamp H, which holds the headrest at any location on the standard,and at the same time to tighten the eye on the. headrest shank.

By this construction I have a compound clamp, answering all therequirements of adjusting a headrest, either for portable use, as in thepresent instance, or"'t'or permanent attachment to a dental chair.

I do not herein claim, broadly, the clamp having the eye slit or open onone side, and with the parts each side of the slit extended andterminating in semicircular bases forming a section of a cone, as suchwill constitute the subject of another application for a patent.

Having described my invention, I claim and desire to secure by UnitedStates Letters Patent 1. The combination, substantially as set forth, ofa standard consisting of an upper part, B, grooved lengthwise, anextension part, E, having its lower end curved to extend under achair-seat and its upper end adapted to slide in the groove and a hookadapted to fit over a chair-back and secured on the standard.

2. In a portable head-rest, the combination, substantially as set forth,of the two-part standard B E, extensible, substantially as described,the lower part curved to extend under the chair-seat and provided with aset-screw,

and a hook having avertical eye through which the two parts of standardmay pass, and provided with means, substantially as described, to secureit at any point of adjustment on the standard.

3. An extensible standard having its upper part grooved lengthwise andprovided alongside of the groove with a set-screw having a beveledenlargement, k, and the lower part adapted to slide in the groove, andhaving notches h formed on one edge, substantially as set forth.

4. A head-rest standard adapted to be attached to an ordinary chair, andhaving its upper end curved, in combination with aheadrest adapted to beattached to and adjusted over the curve of the upper curved end by meanssubstantially as set forth.

5. The combination, substantially as set forth, of a head-rest standardcurved at its upper end and a head-rest adapted to be attached to andadjusted on the curved end by means substantially as set forth.

' 6. The combination, substantially as set forth, of a headreststandardhaving its upper end curved, a compoumd clamp consisting of an eye orgriper through which the head-rest shank passes, a plate, q, to causethe eye to tighten on the shank, a plate, 1, adapted to slide on thecurved partof standard and connected at one end to the plate firstmentioned. and the whole operated by a single set-screw, L.

In witness whereof I hereunto set my hand.

THOMAS J. GARRIOK. Witnesses:

L. H. RoBINsoN, GEO. MOOAF'FRAY.

